williams



Nov. 22, 1955 c. 1. WILLIAMS 2,724,165

ANCHOR FOR CONCRETE FORMS 2 SheetsSheet 1 Filed Sept. 8, 1950 m a W Nov. 22, 1955 c. WILLIAMS 2,724,165

ANCHOR FOR CONCRETE FORMS Filed Sept. 8, 1950 2 Sheets-Sheet 2 United States PatentOfiice Patented Nov. 22, 1955 2,724,165 ANCHOR FOR CONCRETE FORMS Chester I. Williams, Grand Rapids, Mich.

Application September 8, 1950, Serial No. 183,735

at, 2 Claims. (Cl. 25-131) My invention relates to anchoring devices for construction forms and particularly to a new type of crimped anchor for cantilever forms and to be used in low compression concrete work, its use, however, not being limited to such use on cantilever forms or for low compression concrete.

The anchor tie illustrated is particularly adapted for dam construction work as it has a high area in compression to prevent any creeping or slipping in low compression concrete, as for example, in concrete with about five hundred pounds compression per square inch, concrete normally having three thousand pounds per square inch. This low compression concrete is the result of using ice, snow or other retarding elements together with less cement in order to eliminate contraction and expansion that normally takes place in concrete used in dam construction. I

The invention has as an object the production of an anchor adapted for use in this type of concrete which anchor is of reducedlength compared with an anchor with a single pigtail, as it is known in the trade, that would otherwise have tov be used. The cost of the anchor is not onlyreduced, but difficulties in working around a long anchor are obviated.

The present invention has as an object the production of an inexpensive, more efiicient anchoring device for use wherever found applicable.

Many other objects and advantages of the construction herein shown and described will be Obvious to those skilled in the art from the disclosure herein given.

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described,and more particularly pointed out in the claims. v

In the drawings, wherein like reference characters indicate like or corresponding parts:

Fig. l is a sectional view of one form of my anchor as applied to a concrete or like body to a cantilever form, only a part of the form being shown.

Fig. 2 is a plan view of a portion of an anchor showing crimped legs attached to a threaded shank;

Fig. 3 is a sectional view taken substantially on line 33 of Fig. 1;

Fig. 4 is a view somewhat similar to Fig. 2 further modified construction;

Fig. 5 is a view in elevation of another modified construction in which the legs of the anchor are constructed of crimped strap iron; and

Fig. 6 is an end elevation of the same.

I have shown in Fig. 1, an anchor embodied in an showing a illustrative construction job in which 1 represents the concrete body in which the anchor is to be set, 2 being a sheathing or liner for the form arranged with one of the studs 3, 4--4 representing walers. My improved anchor is adapted to be used in numerous ways in connection with concrete forms, hence, the form shown is merely illustrative of a use.

As most clearly shown in Fig. 2, the anchor consists it is obvious that there may be any number.

of a shank 5 preferably threaded as indicated at 6, the shank being extended as indicated at 7 and preferably crimped or bent as shown. The portion 7 constitutes a pig-tail which by itself serves as an anchor. However, I provide the anchor with additional pig-tails or legs 8 and 9 which may be suitably welded or otherwise secured to the shank 5 as illustrated at 10. While I have shown three extending crimped legs 7, 8 and 9, The crimped portions of the legs 7, 8, and 9 are formed with a series of undulations with the apexes of the undulations lying substantially in the same plane and each of said successive integral undulations comprising an arcuate portion at the apex of the undulation and tangential portions substantially tangential to the successive arcuate portions for each apex providing an angular undulation with the tangential portions forming the legs of an angle greater than and less than If desired one of the pig-tails may be provided with supplemental means for resisting the withdrawal of the anchor from the concrete, as for example, as shown, a plate 7' which is secured to the pig-tail 7 at or adjacent the end. When so provided with the plate 7', the other pig-tails might be omitted, this being a matter of preference or requirement.

In use, the form of suitable design is set up with the sheathing, studs 3 and walers 4, the anchor being threadedly secured to a rod 11 extending through or preferably as shown at one side of the studding between the walers. The anchor shank is suitably secured to the waler rod 11, for example, by threading the same thereinto, thereby initially supporting the anchor within the form. At the outer end of the rod 11 is arranged a bracket or plate 12, 13 being a not which may be threaded on the rod 11, maintaining the parts in assembled relation with the form securely anchored in place when the concrete is poured into the form. The anchor is firmly embedded in the concrete and when the form is to be moved or raised the nut 13 may be taken off together with the plate or bracket 12 and the: rod 11 turned ofi from the shank 5 of the anchor. It will be noted that the extreme end 11 of the rod 11 may be constructed for engagement with a suitable wrench for turning the same. It is not necessary to describe in detail how the forms may be moved or raised during the process of building up the concrete body 1.

The anchors are suitable for anchoring any form, knee brace or other construction appliances to the concrete during construction Work. As the wall is built up and the form moved and the rods 11 moved, the holes in the wall at the outer end of the shanks 5 may be plugged up with concrete or any other suitable filling matter.

In the anchor shown in Fig. 4, the construction is modified to the extent that the legs 17, 18 and 19 are not welded together but are threaded and screwed into a block 20. In this case a stud 16 is screwed into the block 20 at the end of 15 on the leg 17, which threaded stud 17 corresponds with the shank 5 of the threaded end 6 of the anchor shown in Fig. 2.

In Fig. 5, a modified construction is shown in which 21 represents a shank in the form of a stud corresponding more or less to the shank 5 previously described. The legs 22 and 24 of the anchor, however, are made of crimped strap iron, the intermediate portion of the legsbeing indicated at 23-25, and these are provided with holes through which the stud 21 may be passed and the parts secured together by means of nuts 26 and 27 or in an equivalent manner. The crimped portions of the legs 22 and 24 are formed with :a series of undulations with the apexes of the undulations lying substantially in the same plane and each of said successive integral undulations comprising an arcuate portion at the apex of the undulation and tangential portions substantially tangential to the successive arcuate portions for each apex providing an angular undulation with the tangential portions forming the legs of an angle greater than 90 and less than 180. The application and use of this'type of anchor is similar to the application and use of anchors shown in-Figs. 1, 2 and4. If desired, the free ends of legs 22 and 24 may be bent laterally so as to serve as an equivalent of plate 7 shown in Figs. 1 and 2. Y a

As before mentioned, this new type of crimped anchor for cantilever forms or other uses is particularly adapted to be used in low compression concrete. The anchor with a multiple of legs gives a very secure rigid and positive construction. The legs constructed as shown permit a good flow of concrete about them for building purposes.

Having thus described my invention, it is obvious that various immaterial modifications may be made in the same without departing from the spirit of my invention; hence, I do not wish to be understood as limiting myself to the exact form, construction, arrangement and combination of parts herein shown and described, or uses mentioned. I

What I claim as new and desire to secure by Letters Patent is:

1. An anchoring device for concrete forms comprising an elongated bar-like member, one end providing a shank, said shank threaded at the outer end thereof, the remainder of said bar-like member providing a bar-like elongated extension at the opposite end, said elongated bar-like extension crimped longitudinally with respect to the length of the bar-like member with a series of undulations extending substantially the length of the barlike elongated extension from the shank with the apexes of the undulations lying substantially in the same plane, each of said successive integral undulations comprising an arcuate portion at the apex of the undulation and tangential portions substantially tangential to the successive arcuateportions for each apex providing an angular undulation with the tangential portions forming the legs of an angle greater than and less than 2. An anchoring device for concrete forms comprising at least two divergent elongated bar-like members, said members connected together to provide a shank, said shank threaded at the outer end thereof, the remainders of each of said bar-like members providing a bar-like extension at the opposite end, each of said elongated bar-like extensions crimped longitudinally with respect to the length of the bar-like member with a series of "undulations extending substantially the length of the bar-like elongated extension from the shank with the apexes of the undulations lying substantially in the same plane, each of said successive integral undulations comprising an arcuate portion at the apex of the undulation and tangential portions substantially tangential to the successive arcuate portions for each apex providing an angular undulation with the tangential portions forming the legs of an angle greater than 90 and less than 180, and said divergent bar-like members intersecting and forming an angle less than 90 and said divergent bar-like members lying substantially in the same plane.

References Cited in the file of this patent UNITED STATES PATENTS OTHER REFERENCES Catalog of-Richrnond Screw Anchor Co., Inc., 838 Liberty Ave., Brooklyn, N. Y., Copyright 1943. 

